Results 1 to 10 of about 975,293 (105)

Air-Lift Pumping System for Hybrid Mining of Rare-Earth Elements-Rich Mud and Polymetallic Nodules around Minamitorishima Island

Journal of Marine Science and Engineering
REE-rich mud under the seabed at a 5500–5700 m water depth around Minamitorishima island and polymetallic nodules buried in the deep seabed are very promising and attractive to explore and develop.
Yoshiyuki Shimizu, Masatoshi Sugihara, Koichiro Fujinaga, Kentaro Nakamura, Yasuhiro Kato   +4 more
doaj   +5 more sources

Numerical Simulation on Hybrid Lifting Operation of Polymetallic Nodules and Rare-Earth Elements-Rich Mud by Air-Lift Pump in Deep Sea around Minamitorishima Island

Journal of Marine Science and Engineering
Polymetallic nodules and REE-rich mud under the seabed of 5500–5700 m water depth around Minamitorishima island are promising and attractive for exploration and development.
Yoshiyuki Shimizu, Masatoshi Sugihara, Koichiro Fujinaga, Kentaro Nakamura, Yasuhiro Kato   +4 more
doaj   +5 more sources

Combined Mining and Pulp-Lifting of Ferromanganese Nodules and Rare-Earth Element-Rich Mud Around Minamitorishima Island in the Western North Pacific: A Prefeasibility Study [PDF]

Minerals (Basel, Switzerland), 2021
An examination of the technical and economic feasibility of the combined mining of the rare-earth element-rich mud (REE-rich mud) and ferromanganese nodules (FN) around Minamitorishima (Marcus) Island in Northwest Pacific is introduced. A previous study showed that the mining of REE-rich mud around Minamitorishima Island was not economically feasible ...
Tetsuo Yamazaki, Naoki Nakatani, Rei Arai   +2 more
exaly   +3 more sources

Secular Variations in Provenance of Sedimentary Components in the Western North Pacific Ocean Constrained by Sr Isotopic Features of Deep‐Sea Sediments

Geochemistry, Geophysics, Geosystems, 2022
Deep‐sea sediments around Minamitorishima Island in the western North Pacific Ocean record the depositional environment in the central to western North Pacific since the late Cretaceous.
Erika Tanaka, Kazutaka Yasukawa, Kentaro Nakamura, Junichiro Ohta, Takashi Miyazaki, Bogdan Stefanov Vaglarov, Shiki Machida, Koichiro Fujinaga, Hikaru Iwamori, Yasuhiro Kato   +9 more
doaj   +3 more sources

Hybrid Mining of Rare-Earth Elements-Rich Mud and Polymetallic Nodules by Air-Lift Pump in Deep Sea around Minamitorishima Island

Journal of MMIJ
REE-rich mud and polymetallic nodules located under the seabed at water depth of 5500–5700 m around Minamitorishima island are highly attractive for exploration and development, given the recent paradigm shift towards renewable energies based on green ...
Yoshiyuki SHIMIZU, Masatoshi SUGIHARA, Yutaro TAKAYA, Koichiro FUJINAGA, Kentaro NAKAMURA, Yasuhiro KATO   +5 more
doaj   +5 more sources

Petrography and stratigraphic Os isotopic ages of ferromanganese nodules from the Northwest Pacific east of Minamitorishima Island

Journal of Asian Earth Sciences: X
The area offshore of Minamitorishima Island, Northwestern Pacific Ocean, contains large amounts of seafloor mineral resources such as ferromanganese (Fe–Mn) nodules, Fe–Mn crusts, and rare-earth element and yttrium (REY)-rich muds.
Tatsuo Nozaki, Kosuke T. Goto, Yutaro Takaya, Kazuhiko Shimada, Akira Owada, Gen Shimoda, Jun-Ichi Kimura, Qing Chang, Tetsuji Onoue, Shiki Machida, Teruaki Ishii, Kenji Shimizu, Naoto Hirano, Kazuhide Mimura, Moei Yano, Junichiro Ohta, Yasuhiro Kato   +16 more
doaj   +4 more sources

Geochemistry of REY-Rich Mud in the Japanese Exclusive Economic Zone Around Minamitorishima Island [PDF]

Geochemical Journal, 2016
We report detailed lithological and chemical characteristics of deep-sea sediments, including rare-earth elements and yttrium-rich mud (REY-rich mud), in the Japanese Exclusive Economic Zone (EEZ) around Minamitorishima Island.
Tatsuo Nozaki, Akira Ijiri, Yoshiro Nishio   +2 more
exaly   +3 more sources

Integrated acoustic identification of a petit-spot volcanic field in the oldest Pacific plate [PDF]

Scientific Reports
Petit-spot volcanism plays a critical role in the metasomatism of oceanic plates prior to subduction and in their recycling into the deep mantle. The extent of metasomatism depends on the number and volume of petit-spot volcanic edifices and intrusions ...
Shiki Machida, Junji Kaneko, Kazuhiro Inose, Tatsuo Nozaki, Koichi Iijima, Naoto Hirano   +5 more
doaj   +2 more sources

Geology and Geochemistry of Ferromanganese Nodules in the Japanese Exclusive Economic Zone Around Minamitorishima Island

Geochemical Journal, 2016
Koichiro Fujinaga, Shiki Machida, Yasuhiro Kato   +2 more
exaly   +3 more sources

Magnetostratigraphic evidence for post-depositional distortion of osmium isotopic records in pelagic clay and its implications for mineral flux estimates

Earth, Planets and Space, 2021
Chemical stratigraphy is useful for dating deep-sea sediments, which sometimes lack radiometric or biostratigraphic constraints. Oxic pelagic clay contains Fe–Mn oxyhydroxides that can retain seawater 187Os/188Os values, and its age can be estimated by ...
Yoichi Usui, Toshitsugu Yamazaki
doaj   +1 more source